XML 38 R27.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Goodwill and Intangible Assets | The following tables presents the change in goodwill and other intangible assets:
|  | Three Months Ended September 30,
|  | 2018 |  | 2017
Millions |  | Goodwill |  | Other intangible assets |  | Unallocated acquisition date fair value of intangible assets |  | Total Goodwill and other intangible assets |  | Goodwill |  | Other intangible assets |  | Total Goodwill and other intangible assets
Beginning balance |  | $ | 25.9 |  |  | $ | 30.7 |  |  | 436.2 |  |  | $ | 492.8 |  |  | $ | 25.9 |  |  | $ | 14.4 |  |  | $ | 40.3 |
Attribution of acquisition date fair value estimates between goodwill and other intangible assets |  | 295.3 |  |  | 140.9 |  |  | (436.2 | ) |  | — |  |  | — |  |  | — |  |  | — |
Foreign currency translation |  | (1.2 | ) |  | (.4 | ) |  | — |  |  | (1.6 | ) |  | — |  |  | — |  |  | — |
Adjustments to reflect acquisition date fair value |  | 1.4 |  |  | — |  |  | — |  |  | 1.4 |  |  | — |  |  | — |  |  | — |
Amortization (1) |  | — |  |  | (7.4 | ) |  | — |  |  | (7.4 | ) |  | — |  |  | (2.5 | ) |  | (2.5 | )
Ending balance |  | $ | 321.4 |  |  | $ | 163.8 |  |  | — |  |  | $ | 485.2 |  |  | $ | 25.9 |  |  | $ | 11.9 |  |  | $ | 37.8 |
(1) Includes the NSM intangible assets amortization of $1.8 related to the period from May 11, 2018 through June 30, 2018 and $3.2 for the three months ended September 30, 2018.
|  | Nine Months Ended September 30,
|  | 2018 |  | 2017
Millions |  | Goodwill |  | Other intangible assets |  | Total Goodwill and other intangible assets |  | Goodwill |  | Other intangible assets |  | Total Goodwill and other intangible assets
Beginning balance |  | $ | 25.9 |  |  | $ | 36.2 |  |  | $ | 62.1 |  |  | $ | 25.9 |  |  | $ | 19.3 |  |  | $ | 45.2 |
Attribution of acquisition date fair value estimates between goodwill and other intangible assets |  | 295.3 |  |  | 140.9 |  |  | 436.2 |  |  | — |  |  | — |  |  | — |
Foreign currency translation |  | (1.2 | ) |  | (.4 | ) |  | (1.6 | ) |  | — |  |  | — |  | — |  | — |
Adjustments to reflect acquisition date fair value |  | 1.4 |  |  | — |  |  | 1.4 |  |  | — |  |  | — |  | — |  | — |
Amortization |  | — |  |  | (12.9 | ) |  | (12.9 | ) |  | — |  |  | (7.4 | ) |  | (7.4 | )
Ending balance |  | $ | 321.4 |  |  | $ | 163.8 |  |  | $ | 485.2 |  |  | $ | 25.9 |  |  | $ | 11.9 |  |  | $ | 37.8 |
Schedule of Intangible Assets and Goodwill | The following table presents the acquisition date values, accumulated amortization and net carrying values for other intangible assets and goodwill, by company as of September 30, 2018 and December 31, 2017:
$ in millions |  | September 30, 2018 |  | December 31, 2017
Acquisition date fair value |  | Accumulated amortization |  | Net carrying value |  | Acquisition date fair value |  | Accumulated amortization |  | Net carrying value
Goodwill: |  |  |  |  |  |  |  |  |  |  |  |
NSM (1) |  | $ | 295.5 |  |  | $ | — |  |  | $ | 295.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
MediaAlpha |  | 18.3 |  |  | — |  |  | 18.3 |  |  | 18.3 |  |  | — |  |  | 18.3 |
Buzzmove |  | 7.6 |  |  | — |  |  | 7.6 |  |  | 7.6 |  |  | — |  |  | 7.6 |
Total goodwill |  | 321.4 |  |  | — |  |  | 321.4 |  |  | 25.9 |  |  | — |  |  | 25.9 |
Other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
NSM (1) |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | 85.5 |  |  | 3.6 |  |  | 81.9 |  |  | — |  |  | — |  |  | — |
Trade names |  | 51.2 |  |  | 1.1 |  |  | 50.1 |  |  | — |  |  | — |  |  | — |
Information technology |  | 3.8 |  |  | .3 |  |  | 3.5 |  |  | — |  |  | — |  |  | — |
Subtotal |  | 140.5 |  |  | 5.0 |  |  | 135.5 |  |  | — |  |  | — |  |  | — |
MediaAlpha |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | 26.8 |  |  | 4.3 |  |  | 22.5 |  |  | 26.8 |  |  | 2.4 |  |  | 24.4 |
Information technology |  | 33.3 |  |  | 29.2 |  |  | 4.1 |  |  | 33.3 |  |  | 24.3 |  |  | 9.0 |
Other |  | 9.8 |  |  | 8.8 |  |  | 1.0 |  |  | 9.8 |  |  | 7.8 |  |  | 2.0 |
Subtotal |  | 69.9 |  |  | 42.3 |  |  | 27.6 |  |  | 69.9 |  |  | 34.5 |  |  | 35.4 |
Buzzmove |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  | .6 |  |  | .1 |  |  | .5 |  |  | .6 |  |  | .1 |  |  | .5 |
Information technology |  | .5 |  |  | .3 |  |  | .2 |  |  | .5 |  |  | .2 |  |  | .3 |
Subtotal |  | 1.1 |  |  | .4 |  |  | .7 |  |  | 1.1 |  |  | .3 |  |  | .8 |
Total other intangible assets | 211.5 |  |  | 47.7 |  |  | 163.8 |  |  | 71.0 |  |  | 34.8 |  |  | 36.2 |
Total goodwill and other intangible assets | $ | 532.9 |  |  | $ | 47.7 |  |  | 485.2 |  |  | $ | 96.9 |  |  | $ | 34.8 |  |  | 62.1 |
Goodwill and other intangible assets attributed to non-controlling interests |  |  |  |  | (40.6 | ) |  |  |  |  |  | (21.1 | )
Goodwill and other intangible assets included in White Mountains’s common shareholders’ equity |  |  |  |  | $ | 444.6 |  |  |  |  |  |  | $ | 41.0 |
(1) Includes the effect of foreign currency translation from the date of acquisition of $1.2 for goodwill and $0.4 for other intangible assets.

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
Name: | us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Goodwill and Intangible Assets Rollforward + References No definition available. + Details
Name: | wtm_GoodwillandIntangibleAssetsRollforwardTableTextBlock
Namespace Prefix: | wtm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration